Are all Duster windshield gaskets the same ?

Here is a 1976 Dart Lite:

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It looks like the same design here.

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If the aftermarket defaulted to the full separate locking strip, this would indicate that this gasket is an original. Next up, a 71 Duster I also have out back:

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It looks like the others I have here.

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What got me curious is that I have a gasket here that seems to have the same shape of a stock one but it has a groove for the lock strip all the way around. So far, I can’t find any numbers or marks on it. I’ve been guilty of dismantling cars thinking that I’ll remember the parts and their application but I’m having trouble with that.